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diff --git a/gcc/testsuite/gfortran.dg/automatic_char_len_1.f90 b/gcc/testsuite/gfortran.dg/automatic_char_len_1.f90
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+! { dg-do compile }
+! PR18082 - Compiler would get stuck in loop, whilst treating
+! the assignments.
+! Test is one of PR cases.
+subroutine snafu (i)
+character*(i) :: c1, c2
+c1 = ""
+c2 = ""
+end subroutine snafu
+
+